61241102521 has 4 divisors (see below), whose sum is σ = 62896267492. Its totient is φ = 59585937552.

The previous prime is 61241102519. The next prime is 61241102567. The reversal of 61241102521 is 12520114216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37651521600 + 23589580921 = 194040^2 + 153589^2 .

It is a cyclic number.

It is not a de Polignac number, because 61241102521 - 2¹ = 61241102519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61241102501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827582430 + ... + 827582503.

It is an arithmetic number, because the mean of its divisors is an integer number (15724066873).

Almost surely, 2^61241102521 is an apocalyptic number.

It is an amenable number.

61241102521 is a deficient number, since it is larger than the sum of its proper divisors (1655164971).

61241102521 is a wasteful number, since it uses less digits than its factorization.

61241102521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655164970.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 61241102521 its reverse (12520114216), we get a palindrome (73761216737).

The spelling of 61241102521 in words is "sixty-one billion, two hundred forty-one million, one hundred two thousand, five hundred twenty-one".